Sorry you haven't gotten a reply yet. I'm not the best person to answer since I haven't hooked up my holding tank yet and am still using tanked oxygen.
The holding tank is commonly used name for the additional oxygen storage tank. The foot pedal makes the process of using the outer flame more efficient and is not absolutely necessary. You can try without the foot pedal and just opening the valves for the outer flame when you need it. If the concentrator and holding tank system can't keep up with the way you use your burner, then you might try adding the foot pedal.
There was a tutorial for making a holding tank, but unfortunately it is no longer available. The thread for it is here <
http://lampworketc.com/forums/showth...t=holding+tank > in case the comments are helpful. There is another thread with a cost estimate here <
http://www.lampworketc.com/forums/sh...d.php?t=221464 >.
Basically, as I remember, the tutorial said this: The holding tank has a connection like that for inflating a car or bicycle tire. It said to remove the internals of the valve so that you don't have to press the stem to get air in an out, and then connect a tee fitting. One end of the tee has a barb fitting to connect to the oxygen concentrator. The middle fitting of the tee screws onto the tank connection. The other end of the tee has a barb fitting to connect to the hose for your burner.
Personally, I wouldn't have done it like that and would have tried to unscrew the connection from the tank and use a threaded coupling to replace the valve and thread a tee onto that, but I can't say whether or not that will work because my holding tank is still in the box.
I think the best thing is to get the holding tank set up, and then if you need help with the foot pedal, then we'll address that at a later time.